FZUS63 KMQT 161401 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 1001 AM EDT Fri Oct 16 2026 For waters beyond 5 nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS... A 30.8 inch high moving through the Plains today weakens to 30.6 inches as it continues eastward. This weakening is expected to bring 30.4 inch ridging over Lake Superior by this evening. The high then slides south of the Great Lakes at 30.5 inches by Saturday night as a 29.2 inch Alberta Clipper moves through the northern Canadian Prairie Provinces towards Hudson Bay, deepening to 29.0 inches by the time it arrives at Hudson Bay on Sunday. This low is expected to bring weak 30.0 inch troughing to northern Lake Superior throughout the day Sunday. As the low continues east over Hudson Bay and weakens with time Sunday night into Monday afternoon, expect high pressure ridging of 30.3 inches to return to the Upper Great Lakes by Monday. The high pressure ridging strengthens to 30.4 inches over Lake Superior by Tuesday as the now 30.5 inch parent high over northern Ontario continues east into northern Quebec, deepening to 30.6 inches as it does so. LSZ162-162000- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 1001 AM EDT Fri Oct 16 2026 /901 AM CDT Fri Oct 16 2026/ ...GALE WARNING IN EFFECT UNTIL 2 PM EDT /1 PM CDT/ THIS AFTERNOON... .REST OF TODAY...North gales to 40 knots diminishing to 15 to 25 knots late. Waves 8 to 11 feet occasionally to 14 feet subsiding to 3 to 5 feet occasionally to 7 feet. .TONIGHT...Northwest winds 10 to 20 knots backing west after midnight, then becoming southwest 20 to 30 knots late. Waves subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet. .SATURDAY...Southwest gales to 35 knots diminishing to 20 to 30 knots late. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .SATURDAY NIGHT...Southwest gales to 40 knots. Waves subsiding to 4 to 7 feet occasionally to 9 feet, then building to 8 to 11 feet occasionally to 14 feet. .SUNDAY...Southwest gales to 40 knots. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .SUNDAY NIGHT...Southwest winds 20 to 30 knots becoming west 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots veering northeast. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots. Waves calm to 2 feet. $$ LSZ263-162000- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 1001 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON... .REST OF TODAY...North gales to 40 knots diminishing to 20 to 30 knots late. Waves 10 to 14 feet occasionally to 18 feet subsiding to 4 to 7 feet occasionally to 9 feet. .TONIGHT...North winds 10 to 20 knots becoming west 5 to 15 knots after midnight, then increasing to 20 to 30 knots late. Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Southwest winds 20 to 30 knots increasing to gales to 35 knots in the afternoon. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .SATURDAY NIGHT...Southwest gales to 40 knots. Waves building to 9 to 12 feet occasionally to 15 feet. .SUNDAY...Southwest gales to 40 knots. Waves subsiding to 6 to 9 feet occasionally to 11 feet. .SUNDAY NIGHT...Southwest winds 20 to 30 knots becoming west 10 to 20 knots after midnight. Waves subsiding to 1 to 3feet. .MONDAY...West winds 5 to 15 knots becoming south less than 10 knots. Waves subsiding to calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ264-162000- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 1001 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... .REST OF TODAY...North gales to 40 knots. Waves 10 to 14 feet occasionally to 18 feet subsiding to 7 to 10 feet occasionally to 13 feet. .TONIGHT...North winds 15 to 25 knots becoming northwest 5 to 15 knots after midnight, then becoming west 15 to 25 knots late. Waves subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .SATURDAY...West winds 20 to 30 knots increasing to gales to 35 knots in the afternoon, then diminishing to 20 to 30 knots late. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY NIGHT...Southwest winds 20 to 30 knots increasing to gales to 35 knots after midnight. Waves subsiding to 4 to 7 feet occasionally to 9 feet, then building to 7 to 10 feet occasionally to 13 feet. .SUNDAY...Southwest gales to 35 knots. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming west 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...West winds 5 to 15 knots diminishing to less than 10 knots. Waves subsiding to calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ265-162000- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 1001 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF TODAY...North gales to 45 knots. A slight chance of showers. Waves 10 to 14 feet occasionally to 18 feet building to 12 to 17 feet occasionally to 21 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .TONIGHT...North winds 20 to 30 knots becoming northwest 10 to 20 knots after midnight, then becoming west 15 to 25 knots late. Waves subsiding to 2 to 4 feet. .SATURDAY...West winds 20 to 30 knots becoming southwest 15 to 25 knots late. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to 3 to 5 feet occasionally to 7 feet. .SUNDAY...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. Waves subsiding to 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots becoming south 10 to 20 knots. Waves calm to 2 feet. $$ LSZ266-162000- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 1001 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF TODAY...North gales to 45 knots. A chance of showers by late morning. Waves 10 to 14 feet occasionally to 18 feet building to 12 to 17 feet occasionally to 21 feet, then subsiding to 10 to 14 feet occasionally to 18 feet. .TONIGHT...North winds 20 to 30 knots becoming northwest 15 to 25 knots after midnight, then backing west late. Waves subsiding to 2 to 4 feet. .SATURDAY...West winds 20 to 30 knots backing southwest late. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet, then building to 4 to 7 feet occasionally to 9 feet. .SUNDAY...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots by mid afternoon. Waves building to 6 to 9 feet occasionally to 11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ267-162000- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 1001 AM EDT Fri Oct 16 2026 ...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF TODAY...North gales to 40 knots. A slight chance of showers by late morning. Waves 6 to 9 feet occasionally to 11 feet building to 10 to 14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. .TONIGHT...North gales to 35 knots diminishing to 15 to 25 knots after midnight, then becoming west 10 to 20 knots late. A slight chance of rain showers. Waves subsiding to 2 to 4 feet. .SATURDAY...West winds 15 to 25 knots becoming southwest 20 to 30 knots in the afternoon, then diminishing to 15 to 25 knots late. Waves building to 4 to 7 feet occasionally to 9 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet. .SUNDAY...Southwest winds 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. .SUNDAY NIGHT...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...West winds 5 to 15 knots. Waves subsiding to calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. $$ LSZ261-162000- MAFOR 1615/ Superior West...GALE WARNING IN EFFECT...11850 11840 11820 11720 11710 11620 11540 11550. Waves 8 to 11 feet subsiding to 5 to 8 feet this afternoon. Waves 3 to 6 feet subsiding to 1 to 3 feet tonight. Waves 3 to 6 feet building to 5 to 8 feet Saturday morning. Superior North Central...GALE WARNING IN EFFECT...11860 11850 12840 11720 11620 11630 11640. Waves 10 to 14 feet this afternoon. Waves 7 to 10 feet subsiding to 2 to 3 feet tonight. Waves 3 to 6 feet building to 5 to 8 feet Saturday morning. Superior South Central...GALE WARNING IN EFFECT...12860 12850 11830 11720 11630 11640. Waves 10 to 15 feet this afternoon. Waves 10 to 13 feet subsiding to 3 to 5 feet tonight. Waves 2 to 4 feet building to 3 to 5 feet Saturday morning. Superior East...GALE WARNING IN EFFECT...13850 11840 11830 11720 11620 11630. Waves 7 to 10 feet building to 10 to 13 feet this afternoon. Waves 9 to 12 feet subsiding to 3 to 6 feet tonight. Waves 3 to 5 feet Saturday morning. $$ WFO MQT Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes